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  2. Relief valve - Wikipedia

    en.wikipedia.org/wiki/Relief_valve

    A relief valve DN25 on cooling water pipe from heat exchanger Schematic diagram of a conventional spring-loaded pressure relief valve. A relief valve or pressure relief valve (PRV) is a type of safety valve used to control or limit the pressure in a system; excessive pressure might otherwise build up and create a process upset, instrument or equipment failure, explosion, or fire.

  3. Surge control - Wikipedia

    en.wikipedia.org/wiki/Surge_control

    Surge control products have been used in many industries to protect the maximum working pressure of hydraulic system for decades. Typical applications for surge relief equipment is in pipelines at pump stations, receiving manifolds at storage facilities, back pressure control, marine loading/off loading, site specific applications where pressure surges are generated by the automation system ...

  4. Pipe support - Wikipedia

    en.wikipedia.org/wiki/Pipe_support

    Internal or external pressure induces stresses in the axial as well as circumferential (Cylinder stress Hoop Stress) directions. The pressure also induces stresses in the radial direction, but these are often neglected. The internal pressure exerts an axial force equal to pressure times the internal cross section of the pipe. F =P[πd^2/4].

  5. Water hammer - Wikipedia

    en.wikipedia.org/wiki/Water_hammer

    Column separation is a phenomenon that can occur during a water-hammer event. If the pressure in a pipeline drops below the vapor pressure of the liquid, cavitation will occur (some of the liquid vaporizes, forming a bubble in the pipeline, keeping the pressure close to the vapor pressure). This is most likely to occur at specific locations ...

  6. Vacuum breaker - Wikipedia

    en.wikipedia.org/wiki/Vacuum_breaker

    Should the supply pressure drop, the disc springs back opening the vent holes (which let in outside air) and preventing backflow of water. A more complex valve that accomplishes much the same purpose is the backflow preventer. Vacuum relief valves are sometimes known as vacuum breakers.

  7. Reduced pressure zone device - Wikipedia

    en.wikipedia.org/wiki/Reduced_pressure_zone_device

    A reduced pressure zone device (RPZD, RPZ, or RPZ valve) is a type of backflow prevention device used to protect water supplies from contamination. RPZDs may also be known as reduced pressure principle (RP), reduced pressure principle backflow prevention devices, [1] [2] reduced pressure zone assemblies (RPZA), [3] or reduced pressure principle ...

  8. Spring allergy pain? Here are 3 tips to beat the sinus pressure

    www.aol.com/lifestyle/spring-allergy-pain-3-tips...

    Looking for relief from painful sinus pressure this spring allergy season? Board certified allergist Dr. Tania Elliott has top tips for keeping your allergies and nasal symptoms under control.

  9. Spring (device) - Wikipedia

    en.wikipedia.org/wiki/Spring_(device)

    Hollow tubing springs can be either extension springs or compression springs. Hollow tubing is filled with oil and the means of changing hydrostatic pressure inside the tubing such as a membrane or miniature piston etc. to harden or relax the spring, much like it happens with water pressure inside a garden hose.

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